Delegator (Class)

In: delegate.rb
Parent: Object 
 Delegation class that delegates even methods defined in super class,

which can not be covered with normal method_missing hack. 

 Delegator is the abstract delegation class. Need to redefine

`getobj’ method in the subclass. SimpleDelegator is the concrete subclass for simple delegation.

Usage: 

  foo = Object.new
  foo2 = SimpleDelegator.new(foo)
  foo.hash == foo2.hash # => false

  Foo = DelegateClass(Array)

 class ExtArray<DelegateClass(Array)
   ...
 end

Methods

__getobj__   marshal_dump   marshal_load   new  

External Aliases

initialize -> initialize_methods

Public Class methods

new(obj)

[Source]

# File delegate.rb, line 21
  def initialize(obj)
    preserved = ::Kernel.public_instance_methods(false)
    preserved -= ["to_s","to_a","inspect","==","=~","==="]
    for t in self.class.ancestors
      preserved |= t.public_instance_methods(false)
      preserved |= t.private_instance_methods(false)
      preserved |= t.protected_instance_methods(false)
      break if t == Delegator
    end
    preserved << "singleton_method_added"
    for method in obj.methods
      next if preserved.include? method
      begin
        eval "def self.\#{method}(*args, &block)\nbegin\n__getobj__.__send__(:\#{method}, *args, &block)\nrescue Exception\n$@.delete_if{|s| /:in `__getobj__'$/ =~ s} \#`\n$@.delete_if{|s| /^\\\\(eval\\\\):/ =~ s}\nKernel::raise\nend\nend\n"
      rescue SyntaxError
        raise NameError, "invalid identifier %s" % method, caller(4)
      end
    end
  end

Public Instance methods

__getobj__()

[Source]

# File delegate.rb, line 53
  def __getobj__
    raise NotImplementedError, "need to define `__getobj__'"
  end
marshal_dump()

[Source]

# File delegate.rb, line 57
  def marshal_dump
    __getobj__
  end
marshal_load(obj)

[Source]

# File delegate.rb, line 60
  def marshal_load(obj)
    initialize_methods(obj)
  end

[Validate]